72-r+20=70

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Solution for 72-r+20=70 equation:


Simplifying
72 + -1r + 20 = 70

Reorder the terms:
72 + 20 + -1r = 70

Combine like terms: 72 + 20 = 92
92 + -1r = 70

Solving
92 + -1r = 70

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-92' to each side of the equation.
92 + -92 + -1r = 70 + -92

Combine like terms: 92 + -92 = 0
0 + -1r = 70 + -92
-1r = 70 + -92

Combine like terms: 70 + -92 = -22
-1r = -22

Divide each side by '-1'.
r = 22

Simplifying
r = 22

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